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Monitor Repair - Mitsubishi DiamondPro   Goto page 1, 2  Next  
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madmanmapper



Joined: 17 Sep 2007
Posts: 36
Location: Chicago, Il, USA

PostPosted: Sat Nov 21, 2009 12:25 am    Post subject: Monitor Repair - Mitsubishi DiamondPro Reply with quote

Hi guys! I picked up a Mitsubishi DiamondPro 2040u. Normally TVs are large item pickups, but believe me, this monitor qualifies as a large item. It's friggin huge, 20" screen, weighs as much as a refrigerator, and is about as bulky as one.

Anyhow, it had "garbage" written on the side of it (that's where I found it, go figure). It powers up and displays fine. Only problem is a slight blur in the picture. There seems to be a sort of... hmm, for lack of a better word, a "shadow" of the screen image. It's sort of like there are 2 of the same image, but one is less visible and moved down and to the right by 1/8 inch. Actually there are 2 shadows, the second "shadow" is even less visible than the first. And also, there are 2 barely noticable horizontal lines across the screen, one is about 3 inches from the top and the other is about 3 inches from the bottom. These lines do not have shadows.

I have tried messing with all of the settings in the menu, nothing helps. It's a CRT monitor, it can't be that different from CRT tvs, right? :P

I would appreciate any help. I'd like to know if this monitor can be fixed, and if so, how, because the Diamond Pro is pretty much the best CRT monitor, and I like my CRTS :)

Note - I'm farely competent with electronic stuff, I can solder!
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madmanmapper



Joined: 17 Sep 2007
Posts: 36
Location: Chicago, Il, USA

PostPosted: Thu Dec 24, 2009 2:46 am    Post subject: Reply with quote

Come on not even a passing comment? This thing is huge and it's in the middle of my floor.
JTS1957



Joined: 21 Jan 2009
Posts: 2305
Location: Far, Far Away

PostPosted: Thu Dec 24, 2009 3:24 am    Post subject: Reply with quote

Since we're both in the same area... Cool
Check electrolytic capacitors on CRT circuit board. Idea
madmanmapper



Joined: 17 Sep 2007
Posts: 36
Location: Chicago, Il, USA

PostPosted: Fri Dec 25, 2009 5:22 pm    Post subject: Reply with quote

That was a good idea. So I cracked it open and looked all over, I can't spot any problems. No leaky or bulging caps... :/ Oh well.

Any other ideas? :)
JTS1957



Joined: 21 Jan 2009
Posts: 2305
Location: Far, Far Away

PostPosted: Fri Dec 25, 2009 9:58 pm    Post subject: Reply with quote

madmanmapper wrote:
No leaky or bulging caps...


Those are NOT the ONLY ways caps can fail. You need to test them for "Value" and "ESR," at least. Smile
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madmanmapper



Joined: 17 Sep 2007
Posts: 36
Location: Chicago, Il, USA

PostPosted: Sat Dec 26, 2009 2:12 am    Post subject: Reply with quote

JTS1957 wrote:
Those are NOT the ONLY ways caps can fail. You need to test them for "Value" and "ESR," at least. :)


Do you know how many caps there are on this thing? Or on any electrical device such as this? A LOT. Not worth the effort. Besides, it's probably something else causing it.
JTS1957



Joined: 21 Jan 2009
Posts: 2305
Location: Far, Far Away

PostPosted: Sat Dec 26, 2009 2:54 pm    Post subject: Reply with quote

I Tried.

If you can't stand the heat ... get out of the kitchen. Smile
madmanmapper



Joined: 17 Sep 2007
Posts: 36
Location: Chicago, Il, USA

PostPosted: Sat Dec 26, 2009 7:49 pm    Post subject: Reply with quote

Well thanks anyway :|
madmanmapper



Joined: 17 Sep 2007
Posts: 36
Location: Chicago, Il, USA

PostPosted: Thu Jan 28, 2010 10:43 pm    Post subject: Reply with quote

Relentless googling suggested that monitor cables cause ghosting. Sure enough, I bought a high quality monitor cable from newegg and the ghosting is gone. But those horizontal lines are still there. They are barely visible but if I used this monitor as my primary it would surely annoy me. And I think even this cable is imperfect, if you look really hard you can see some interference in the image. Other than that it's a top quality image! :P
madmanmapper



Joined: 17 Sep 2007
Posts: 36
Location: Chicago, Il, USA

PostPosted: Mon Feb 01, 2010 9:28 pm    Post subject: Reply with quote

I already did, they all look fine. No way im testing each one.
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